System Too Rich (Bank 1)
| Code | P0172 |
| Description | System Too Rich (Bank 1) |
| Possible Causes | The fuel system is running too rich on bank 1. Common causes: faulty O2 sensor, leaking fuel injector, high fuel pressure. |
| System | Fuel and Air Metering |
System Too Rich (Bank 1). This diagnostic trouble code (DTC) is stored when the vehicle's onboard computer detects an issue with the fuel and air metering.
P = Powertrain code
0 = Generic (SAE standard)